When to call L&D?

I have been having long contractions, felt sick, run down, heart is beating fast, immense pain in my lower regions with each contraction. Incredibly tired, but can't sleep. All together just don't feel right. I lost my mucus plug on Wednesday. No bloody show, contractions are 6-10 minutes apart, and last anywhere from 45 seconds to 1:30, strongest was 2:04. I don't want to call them and go in for nothing again, do these sound about right?